| /* FPU control word definitions. ARM VFP version. |
| Copyright (C) 2004, 2005, 2009 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _FPU_CONTROL_H |
| #define _FPU_CONTROL_H |
| |
| #if !defined(_LIBC) && defined(__SOFTFP__) |
| |
| #define _FPU_RESERVED 0xffffffff |
| #define _FPU_DEFAULT 0x00000000 |
| typedef unsigned int fpu_control_t; |
| #define _FPU_GETCW(cw) 0 |
| #define _FPU_SETCW(cw) do { } while (0) |
| extern fpu_control_t __fpu_control; |
| |
| #else |
| |
| /* masking of interrupts */ |
| #define _FPU_MASK_IM 0x00000100 /* invalid operation */ |
| #define _FPU_MASK_ZM 0x00000200 /* divide by zero */ |
| #define _FPU_MASK_OM 0x00000400 /* overflow */ |
| #define _FPU_MASK_UM 0x00000800 /* underflow */ |
| #define _FPU_MASK_PM 0x00001000 /* inexact */ |
| |
| /* Some bits in the FPSCR are not yet defined. They must be preserved when |
| modifying the contents. */ |
| #define _FPU_RESERVED 0x0e08e0e0 |
| #define _FPU_DEFAULT 0x00000000 |
| /* Default + exceptions enabled. */ |
| #define _FPU_IEEE (_FPU_DEFAULT | 0x00001f00) |
| |
| /* Type of the control word. */ |
| typedef unsigned int fpu_control_t; |
| |
| /* Macros for accessing the hardware control word. */ |
| /* This is fmrx %0, fpscr. */ |
| #define _FPU_GETCW(cw) \ |
| __asm__ __volatile__ ("mrc p10, 7, %0, cr1, cr0, 0" : "=r" (cw)) |
| /* This is fmxr fpscr, %0. */ |
| #define _FPU_SETCW(cw) \ |
| __asm__ __volatile__ ("mcr p10, 7, %0, cr1, cr0, 0" : : "r" (cw)) |
| |
| /* Default control word set at startup. */ |
| extern fpu_control_t __fpu_control; |
| |
| #endif /* __SOFTFP__ */ |
| |
| #endif /* _FPU_CONTROL_H */ |
